{"api_version":"1","generated_at":"2026-07-23T14:33:23+00:00","cve":"CVE-2026-64042","urls":{"html":"https://cve.report/CVE-2026-64042","api":"https://cve.report/api/cve/CVE-2026-64042.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64042","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64042"},"summary":{"title":"vfio/pci: Check BAR resources before exporting a DMABUF","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Check BAR resources before exporting a DMABUF\n\nA DMABUF exports access to BAR resources and, although they are\nrequested at startup time, we need to ensure they really were reserved\nbefore exporting.  Otherwise, it's possible to access unreserved\nresources through the export.\n\nAdd a check to the DMABUF-creation path.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:44","updated_at":"2026-07-20 15:17:04"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/702809dabdecca807bdd50cfdcc1c980feb2ba62","name":"https://git.kernel.org/stable/c/702809dabdecca807bdd50cfdcc1c980feb2ba62","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8443cd4497a4498c4b01058d76a92116244cb605","name":"https://git.kernel.org/stable/c/8443cd4497a4498c4b01058d76a92116244cb605","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64042","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64042","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d74781ebc86c5fa9e9d6934024c505412de9b52 8443cd4497a4498c4b01058d76a92116244cb605 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d74781ebc86c5fa9e9d6934024c505412de9b52 702809dabdecca807bdd50cfdcc1c980feb2ba62 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64042","cve":"CVE-2026-64042","epss":"0.001890000","percentile":"0.087840000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:13"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/vfio/pci/vfio_pci_dmabuf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8443cd4497a4498c4b01058d76a92116244cb605","status":"affected","version":"5d74781ebc86c5fa9e9d6934024c505412de9b52","versionType":"git"},{"lessThan":"702809dabdecca807bdd50cfdcc1c980feb2ba62","status":"affected","version":"5d74781ebc86c5fa9e9d6934024c505412de9b52","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/vfio/pci/vfio_pci_dmabuf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Check BAR resources before exporting a DMABUF\n\nA DMABUF exports access to BAR resources and, although they are\nrequested at startup time, we need to ensure they really were reserved\nbefore exporting.  Otherwise, it's possible to access unreserved\nresources through the export.\n\nAdd a check to the DMABUF-creation path."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:42:43.720Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8443cd4497a4498c4b01058d76a92116244cb605"},{"url":"https://git.kernel.org/stable/c/702809dabdecca807bdd50cfdcc1c980feb2ba62"}],"title":"vfio/pci: Check BAR resources before exporting a DMABUF","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64042","datePublished":"2026-07-19T15:39:28.604Z","dateReserved":"2026-07-19T07:54:57.029Z","dateUpdated":"2026-07-20T13:42:43.720Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:44","lastModifiedDate":"2026-07-20 15:17:04","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2,"impactScore":6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64042","Ordinal":"1","Title":"vfio/pci: Check BAR resources before exporting a DMABUF","CVE":"CVE-2026-64042","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64042","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Check BAR resources before exporting a DMABUF\n\nA DMABUF exports access to BAR resources and, although they are\nrequested at startup time, we need to ensure they really were reserved\nbefore exporting.  Otherwise, it's possible to access unreserved\nresources through the export.\n\nAdd a check to the DMABUF-creation path.","Type":"Description","Title":"vfio/pci: Check BAR resources before exporting a DMABUF"}]}}}